diff --git a/src/renderers/webgl/WebGLCapabilities.js b/src/renderers/webgl/WebGLCapabilities.js
index 14a245b4718da3fb66cf9b598880a3922c3c4311..fb19cf708b4c88ba90c4469f084e02bf78882277 100644
--- a/src/renderers/webgl/WebGLCapabilities.js
+++ b/src/renderers/webgl/WebGLCapabilities.js
@@ -56,8 +56,10 @@ function WebGLCapabilities( gl, extensions, parameters ) {
 
 	}
 
+	/* eslint-disable no-undef */
 	var isWebGL2 = ( typeof WebGL2RenderingContext !== 'undefined' && gl instanceof WebGL2RenderingContext ) ||
 				   ( typeof WebGL2ComputeRenderingContext !== 'undefined' && gl instanceof WebGL2ComputeRenderingContext );
+	/* eslint-enable no-undef */
 
 	var precision = parameters.precision !== undefined ? parameters.precision : 'highp';
 	var maxPrecision = getMaxPrecision( precision );